On 21/02/12 10:40, Sunil Padda wrote:
> We want to be able to do both read&  write  to the underlying database.
> As app-schema gives a read-only view of the data, this doesn't suit our
> needs. Is there any work in progress for the future to enable
> app-schema to support writes? (As I understand, it's not possible. But,
> I would like to confirm).

Correct. app-schema does not yet support transactions (and in the 
GeoServer world, it does not support WFS-T).

One missing piece is the parsing of complex feature GML into GeoTools 
objects. There is a third-party implementation based on GeoTools but it 
has not yet been contributed. Some of my colleagues are currently in 
communication with the authors. My colleagues aim to get GeoTools 
consuming complex GML. This would likely be of *great* assistance to you.

> I didn't look at the app-schema code yet, but is there any code in
> app-schema that we could potentially leverage when building a custom
> solution (maybe something like ComplexFeatureType, ComplexFeature,
> ComplexFeatureBuilder etc.).

Potentially. These are just FeatureTypeImpl and FeatureImpl. There is 
not yet any builder (Andrea has justifiably complained about this); 
building complex features is rather tricky as it refers to external 
schemas and circular relationships between types. Please have a look at 
the many app-schema unit tests.

> One last question. Assuming we somehow build our own custom solution to
> create complex features, does GeoServer support reads and writes from
> it? If not, are there any other WFS servers that do?

Sorry, I don't know.

Kind regards,

-- 
Ben Caradoc-Davies <[email protected]>
Software Engineer
CSIRO Earth Science and Resource Engineering
Australian Resources Research Centre

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